Use wx-prefixed macros throughout the repository.

Change {DECLARE,IMPLEMENT}_*CLASS and {DECLARE,BEGIN,END}_EVENT_TABLE
occurrences to use the wx-prefixed version of the macros.

include/wx/variant.h

@@ -389,7 +389,7 @@ protected:
     wxString        m_name;
 
 private:
-    DECLARE_DYNAMIC_CLASS(wxVariant)
+    wxDECLARE_DYNAMIC_CLASS(wxVariant);
 };